Searches for lepton number violation and resonances in K± → πμμ decays

6533b7d2fe1ef96bd125f757

RESEARCH PRODUCT

Searches for lepton number violation and resonances in K± → πμμ decays

Batley J. R. Kalmus G G. Lazzeroni C. Munday D. J. Slater M. W. Wotton S. A. Arcidiacono R. Bocquet G. Cabibbo N. Ceccucci A. Cundy D. Falaleev V. Fidecaro M. Gatignon L. Gonidec A. Kubischta W. Maier A. Massri K. Norton A. Patel M. Peters A. Balev S. Frabetti P. L. Gersabeck E. Goudzovski E. Hristov P. Kekelidze V. Kozhuharov V. Litov L. Madigozhin D. Molokanova N. Polenkevich I. Potrebenikov Y. Stoynev S. Zinchenko A. Monnier E. Swallow E. Winston R. Rubin P. Walker A. Baldini W. Cotta Ramusino A. Dalpiaz P. Damiani C. Fiorini M. Gianoli A. Martini M. Petrucci F. Savrié M. Scarpa M. Wahl H. Bizzeti A. Lenti M. Veltri M. Calvetti M. Celeghini E. Iacopini E. Ruggiero G. Behler M. Eppard K. Kleinknecht K. Marouelli P. Masetti L. Moosbrugger U. Morales Morales C. Renk B. Wache M. Wanke R. Winhart A. Coward D. Dabrowski A. Fonseca Martin T. Shieh M. Szleper M. Velasco M. Wood M. D. Cenci P. Pepe M. Petrucci M. C. Anzivino G. Imbergamo E. Nappi A. Piccini M. Raggi M. Valdata Nappi M. Cerri C. Fantechi Gianmaria Collazuol G. Dilella L. Lamanna G. Mannelli I. Michetti A. Costantini F. Doble N. Fiorini L. Giudici S. Pierazzini G. Sozzi M. Venditti S. Bloch Devaux B. Cheshkov C. Chèze J. B. De Beer M. Derré J. Marel G. Mazzucato E. Peyaud B. Vallage B. Holder M. Ziolkowski M. Biino C. Cartiglia N. Marchetto F. Bifani S. Clemencic M. Goy Lopez S. Dibon H. Jeitler M. Markytan M. Mikulec I. Neuhofer G. Widhalm

subject

lepton BEAM 01 natural sciences 7. Clean energy Physics Particles & Fields High Energy Physics - Experiment LIMITS kaon physics CERN Intermediate state lepton number violation neutrinos dark matter kaon physics Physics VMSM Large Hadron Collider Physics Charge Kaons neutrinos Nuclear and High Energy Physics; CERN; leptons High Energy Physics - Experiment; Charge Kaons; Lepton number violation Nuclear & Particles Physics Charged particle lcsh:QC1-999 NEUTRAL HEAVY-LEPTONS Physics Nuclear lepton number violation Physical Sciences Particle physics Nuclear and High Energy Physics leptons kaon decays lepton number violation Nuclear and High Energy Physics lepton kaon meson lepton number violation NA48 Socio-culturale Astronomy & Astrophysics UPPER-BOUNDS dark matter Nuclear physics 0202 Atomic Molecular Nuclear Particle And Plasma Physics 0103 physical sciences DARK-MATTER PARTICLES 010306 general physics Science & Technology kaon decays 010308 nuclear & particles physics Branching fraction Resonance Inflaton Lepton number kaon meson NA48 High Energy Physics::Experiment lcsh:Physics Lepton

description

The NA48/2 experiment at CERN collected a large sample of charged kaon decays to final states with multiple charged particles in 2003–2004. A new upper limit on the rate of the lepton number violating decay K±→π∓μ±μ± is reported: B(K±→π∓μ±μ±)<8.6×10−11 at 90% CL. Searches for two-body resonances X in K±→πμμ decays (such as heavy neutral leptons N4 and inflatons χ ) are also presented. In the absence of signals, upper limits are set on the products of branching fractions B(K±→μ±N4)B(N4→πμ) and B(K±→π±X)B(X→μ+μ−) for ranges of assumed resonance masses and lifetimes. The limits are in the (10−11,10−9) range for resonance lifetimes below 100 ps.

year	journal	country	edition	language
2017-06-01

10.1016/j.physletb.2017.03.029 http://hdl.handle.net/11577/3233593